Miter-box saw-guide.



No. 851,841. PATBNTED APR. 30, 1901. B. A. SGHADE.

MITBR BOX SAW GUIDE. APPLIOATIOI FILED KAI. 9, 1901;

2 SHEETS-SIZE! 1.

8 wvwnfoz I Ill Imus: "rill: cm. IAIIIRIM. D. c.

7 0 g 1 V h 3 A vD E T N B n A P v No. 851.841.

E. A. SGHADE.

MITER BOX SAW GUIDE.

APPLIOATIOI nun RAB. o, 1901.

l8HBBT8-BKBET 2. V

wilmwow LII UNITED v STATES PATENT OFFICE.

EDMUND-A. SCIIADE, OF NEW BRITAIN, CONJYECTICL'T, ASSIGXOR TO STAB LEY RULE & LEVEL COMPANY, OF XEW BR ITAIN, CONN PICTICUT, A COR- PORATION ()F CO\'1\ ECT ICUT.

" i a'uTEn-Box SAW-GUIDE.

Specification of Letters Patent.

Patented April 30, 1907.

I Application filed March 9.1907. Serial N 361.476.

citizen oi the United States, residing at New f Brit-am, Connecticut, (post otlice address same-,1 have invented certain new and useful so ad ust-ed to press the roll verv tightly Iniprm'ements in Miter-Box Saw-Guides, of which the following is a full, cL-ar, and exact description.

My invention relates to miter boxes, and particularly to an improvement in the saw guide portion thereof.

In the drawings,Figure 1 is a cross section 9 the miter boi with my invention applied ereto, shown in elevation; Fig. 2 is'a relaely enlarged detail view of the saw carrier, of the rolls and hearings for the saw guide- .g in section; Fig. 3 isa section on line of Fig. 2, looking down; Fig. 4 is a section of a modified consti. '.ctio1i.

Since my invention relates particularly to the saw guide, I need not describe at length the construction of the miter box, to which this guide is applied. It is sutlicient to say that 1 represents the floor or work-support of the miter box; 2 the back, slot-ted in the usual manner to permit the saw to pass through.

3-3 are the usual legs.

4 is the saw carrier arm, pivoted at 5 to swing at the desired angle'relatively to the back. At each end of the swinging carrier arm i is the saw guide or carrier proper. Each of :hose guides is constructed as follows: 6 is the base having a downward extension or bearing 7 which fits into a suitable jaw-like opening at the adjacent end of the carrier arm 4. 8 is a set-screw whereby the jaw members mav be clamped upon the bearing 7 to hold the base 6 at the desired angle of adjustment. Extending upwardly from the base 6 are two rods 9-9, preferably connected at the top. Each of said rods bear a roller, each roller being capable of rotation as well as vertical movement thereon to permit the saw to be reciprocated and tov rise and fall.

In the preferred form, each roller is provided with two bearings 11111310, 10 which stand against the side of the-saw blade 11.

12 is a saw back which is arranged to pass through the space 14.

15 is a third hub on the upper end of each guide roll.

In devices of this type, the degree of snugness with which the opposite rolls of a single set are caused to embrace the (\ppUSitQ side of the saw blade 11, depends upon the angle of the base (i relatively to the arnri. in the. ordinary construction, when this base (i is against the opposite 'sides or the saw a considerable iriction is developed, t1.- to retard the ireedom oi rotation of each ot the rolls as the saw is reciprocated. In order to reduce this, I provide ball bearings, and, in this instance, of a special type in the upper and lower ends oi each roll. ()no form oi this ball bearing 15 shown in 'Fig. l, and it will be sullicient to describe one of said bee rings, since they are all similar in this V'i("\\". 1(i16ropresentthe balls themselves; 17 and 18 are bushings carried in a recess in the end of the roll and taking the outward thrust of the balls 16. One of these bushings 18, for example, may be screwthreaded in the recess in which it stands. 19 is a cylindrical bushing fitted upon the rod 9, so as to slide freely up and down thereon, and it is against the outer wall of this bushingthat the inner thrust of the balls 16 is taken. There is a space at the upper and lower edge of the bushing 19, and between the bushings I7 and IS, in which other balls 20 maybe 10- cated. These balls take the up and down thrust. There is sullicient clearance, of course, between the outer wall and the bushing 19 and the inner walls of the bushings 17 and 18. All these bushings may be made of very hard material to prevent the balls from scoring the surface. In this respect it will be seen that the balls do not directly engage the rods 9, hence there is no danger of scoring the same, no matter what the pressure may be. It should be understood thatthe bushings 19 may travel freely up and down on the rods 9. as well as rotate thereon.

In the form shown in Fig. 4, I have el ,o nated the balls 20-20. In this construct 17 a and 18 are bushings corresponding ge orally to the bushings 17 and 18, pueviouslv described. 16 are the be. is as before. 19 is the bushing which slides and rotates directly upon the rod 9. In this modification it will be seen that substantially the only change involved comprises forming a roove in the periphery of the hardened bushing 19*, in which the balls 16 travel.

Consequently, in this form the balls 16 alone perform the function of the three sets t balls 16, 220 and 20, shown in Fig. 2. In all are so constructed as, in (-ll'eet, to be reiainers, so should one of the rollers be removed from its red, the hearing will not be disniembered. 21 are the usual stop devices, adustably mounted on the rods 9 9 to limit th l O 'r ox flur'vinn (-f only quid n ull \Yhat l claim is;-

pivotally carried thereby, a. saw-guide for said arm, said smr-guide including a base, a

pair of parail'ei upright pos carried thereby, a set: of companion guide rolls, a passage between said set of rolls, a ball-bearing for each end of each roll, a bushing for each ballbushing being slida-ble direetlv'i posts carried thereby, a set of companion bearing upon it; post, the balls of each bearing di- 1Cll engaging said bushing and holding the bushing at all times in'surh a manner as to cause the same to rise and fall iih said roll.

2. In a miter box, a frame, a carrier arm said bushing.

3. In a miter box, a frame, a carrier box these forms, it will be observed that the balls pivoted thereto, a saw-guide, said saw-guide are furnished with bearingsand the bearings lnl'llltllllg a base mounted on said arm, a pair of parallel upright posts carried thereby, a set of companion guide rolls mounted on said posts. a saw passage between said set of rolls, a ball-bearing for the upper and lower end 0t 1 each roll, each bearing including a bushing sl lalile direetl t'upon its post. the balls of arm, said smr-guide including a base nrounted on said arm, a pair of parallel upright )osts carried therebv a set; of com anion 1 n n a n I n roll against said bushing 111 both directions.

guide rolls mounted on said rolls, a saw passage bet-ween said set of rolls, a ball-bearing Q for the upper and lower end of each roll each bearing including a bushing shdable dlrectly upon its post, the balls of said bearings env, said bearing taking directly against the ex- 1. In a IIIILUI' box, a frame, a carrier arm ternalu'all of said bushing and the peripheral groove in said bushing into wlueh said balls project. 7

4. In a nnter box, a frame, a carrier arm pivoted thereto, a saw-guide for sald'ea-rrier ed on' said arm, a pair of parallel upright guide rolls mounted on said posts, a saw passage between said set of rolls, a ball-bearing for the upper and loner end of each roll, said bearings including a bushing slidable directly upon i'is post, the balls of said bearing )ivoted thereto a. sawuide for said carrier taking direcrlv a ainst the external wall of said bushing and also including series ol' balls at the upper and lower ends of said bushing and arranged to take the end thrust of sand EDMUX D A. SCHADE.

'Witnesses:

. H. S. \VALTER, \V. J. W'QRAM.

arm, said saw-guide including a base mount- It is hereby certified that in Letters Patent No. 851,841, granted April 30, 1907, upon the application of Edmund A. Shade, of New Britain, Connecticut, for an improvement in Miter-Box Saw-Guides, errors appear requiring correction, as fol- E lows: Page 1, line 47, the words hearings hub should read bearing hubs; same page, *3 line 59, the word roll should read rolls, lines 9697, the letters e1 on nated should read eliminated, line 97, the word construct should read com-traction, line 98, g the letters ge should read gen-, and line 99, the word previous should read 5 previously; and that the said Letters Patent should be read with these corrections 7 therein that the same may conform to the record of the case in the Patent Office. 2 Signed and sealed this 28th day of May, A, 1)., 1907.

.5 [SEAL] I E. B. MOORE,

2 7 Acting Commissioner of Patents. L r

we J 

